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san4es73 [151]
3 years ago
9

What are superconductors?

Chemistry
2 answers:
DaniilM [7]3 years ago
8 0

The answer would be B

Check out my quizlet

HOPE I HELPED!!

:)

EleoNora [17]3 years ago
7 0
Superconductors are materials that transfer energy with no resistance. Metals are usually the best conductors.

Superconductivity is a phenomenon characterized by zero electrical resistance at below critical temperatures. Metals are the best conductors because the molecules inside them are tightly packed, which allows electricity to travel efficiently.

Water is also a good conductor because of the ions and minerals in it. However, water itself is not a conductor of electricity.
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A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder
Elina [12.6K]

Answer:

The answers to the questions are as follows

  1. The temperature of the water bath goes up
  2. The piston moves out
  3. Heat flows out of the gaseous mixture
  4. 173.kJ flows out of the system

Explanation:

  • From the question, it is noted that 173.kJ of heat flows out of the system into the insulated water bath therefore the temperature of the water bath goes up

as seen in the relation ΔH = m·c·ΔT

Where ΔH heat measured by temperature  rise ΔT of a given mass of water m of specific heat capacity of 4.2 J/g°C

  • The amount of heat measured from previous experiment is more than the heat from the present reaction therefore since in the present reaction is constant pressure and from the first law of thermodynamics Energy can neither be created nor destroyed, the balance heat will be transformed to work evidence in the piston moving out

ΣH = Q + W  where

w = P × ΔV = P × (P₂ - P₂)

  • Heat flows out of the gaseous mixture and is sensed from the rise in the temperature of the water bath
  • 173.kJ flows out of the system

3 0
3 years ago
A .60 L sample of nitrogen is heated from 27℃ to 77℃ at a constant pressure. What is the final volume of the gas?
Anon25 [30]

Answer:

CHARLES' LAW

given:

= 600 mL = 0.6 L

= 27 °C = 300.15 L

= 77 °C = 350.15 L

conversion:

= 600 mL (1 L / 1000 mL)

= 0.6 L

= 27 °C + 273.15 K

= 300.15 K

= 77 °C + 273.15 K

= 350.15 K

solution:

= ( × ) ÷

= (0.6 L × 350.15 K) ÷ 300.15 K

= 0.7 L

4 0
3 years ago
How many grams of magnesium oxide are formed if 20.9 grams of Mg and 15.2 g of O2 react.
anyanavicka [17]

Answer:

Mass of magnesium oxide formed = 35.1 g

Explanation:

Given data:

Mass of Mg = 20.9 g

Mass of O₂ = 15.2 g

Mass of magnesium oxide formed = ?

Solution:

Chemical equation:

2Mg + O₂     →   2MgO

Number of moles of Mg:

Number of moles = mass/molar mass

Number of moles = 20.9 g/ 24 g/mol

Number of moles = 0.87 mol

Number of moles of O₂:

Number of moles = mass/molar mass

Number of moles = 15.2 g/ 32 g/mol

Number of moles = 0.475 mol

Now we will compare the moles of MgO with magnesium and oxygen.

                Mg          :         MgO

                  2           :           2

                0.87        :         0.87

                  O₂         :         MgO

                     1         :            2

                   0.475   :        2/1×0.475 = 0.95  

Number of moles of MgO formed by Mg are less thus Mg will limiting reactant.

Mass of MgO:

Mass = number of moles × molar mass

Mass = 0.87 mol × 40.3 g/mol

Mass = 35.1 g

                 

6 0
3 years ago
- What mass of sulfur trioxide is formed and what is the limiting reactant? Please show all of your calculations so I can unders
Svetlanka [38]

brainly.com/question/11158730

6 0
2 years ago
What is the final pressure (expressed in atm) of a 3.05 l system initially at 724 mm hg and 298 k, that is compressed to a final
krok68 [10]

<u>Answer:</u>

P2 = 778.05 mm Hg = 1.02 atm

<u>Explanation:</u>

We are to find the final pressure (expressed in atm)  of a 3.05 liter system initially at 724 mm hg and 298 K which is compressed to a final volume of 2.60 liter at 273 K.

For this, we would use the equation:

\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}

where P1 = 724 mm hg

V1 = 3.05 L

T1 = 298 K

P2 = ?

V2 = 2.6 L

T2 = 173 K

Substituting the given values in the equation to get:

\frac{(724)(3.05)}{298} =\frac{P_2(2.6)}{173}

P2 = 778.05 mm Hg = 1.02 atm

7 0
3 years ago
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